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Newbie Strobe Positioning

strobe canon bigeye

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#1 bmorescuba

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Posted 24 January 2013 - 06:09 PM

Hi,

I'm a relative newbie, and very much a newbie with a strobe. Here is my setup:

Canon G12
Canon WP-DC34 Underwater Housing
BigEye WA Wet Lens (http://www.fantasea..../it.A/id.410/.f)
One Sea & Sea YS-110a strobe
iDas arms and clamps

I have read a lot about strobe positioning but I don't seem to be getting it. Attached are some random snaps from a recent trip that illustrate a common issue I'm having. It seems as if the strobe is being reflected by the wide angle adapter and causing hotspots or flares of sorts. It doesn't happen on all the shots, but I experiment a lot with angles and can't consistently remember what position yields what result. I can often crop it out, but not always. And I'd really like to have a better sense of why this is happening and what I can do to prevent it.

Thanks!

Attached Images

  • wp4.jpg
  • wp2.jpg
  • wp3.jpg


#2 troporobo

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Posted 24 January 2013 - 11:23 PM

It looks possible that your strobe is positioned in front of the port and causing a reflection. If so it should be moved behind that plane.

In the first two images, I don't see much evidence that the strobe even illuminated the scene, which suggests it is not aimed at all correctly.

Try reading through these brief guides:

http://www.uwphotogr...obe-positioning

http://www.divephoto...be-positioning/

Edited by troporobo, 24 January 2013 - 11:29 PM.


#3 MortenHansen

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Posted 25 January 2013 - 01:45 AM

Im not sure if its a reflection, could it be an air-bubble trapped inside your Bigeye?

One thing I would suggest that you work on is getting closer (much closer).

Also you need to realize that with your setup there are certain limitations, that fan on your first shot looks really big, you should try to find subjects that are for sure no bigger than 60x40 cm (ish).
Even when I am shooting with my 10mm fisheye (a lot "wider" than your setup) on my DSLR with 2x strobes I look for small subjects that I can get really close to, its really really rare that I shoot something much bigger than 1meter across.

Good luck!
-Morten